Collapsible tube



W. KALB.

COLLAPSIBLE TUBE.

APPLICATION FILED MAY 31.1922.

1,4;37249, Patented Nov. 28, 1922.

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PATENT OFFICE.

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. Application filed May a, was. Serial in. 564,914.

; My invention relates to improvements. in.

a tin tubes, and more particularly in tin tubes provided with spring actuated closing means adapted when compressing the tube to be opened by the matter enclosed therein. One

of the ob ects of the improvements is to pro- 'vide a tu which is simple in construction.

Another object is to rovide a tube in' which It even com aratively t ick matter .coming out of the tu e is readily separated when reliev ing the pressure. A. third object of the improvements is to provide a tube in WhlCh the matter comes out of thetube in the'form of a; cylindrical tube having athin wall that collapses into a. thin ban t5 ing, in which the same reference characters have been used in all the views to indicate corresponding parts. In said drawing,

. Fig. 1, is'an elevation partly in section i showing the upper part of the tube, and

40 Fig. 2', is a plan view of Fig. 1.

In the example shown'in the figures the bod a of the tube is made with a head a, sai arts havin a form permitting the manu acture of t e tube in one operation according-to the methods now in use for.

manufacturing tubes. The 0 on head a carries a conical stopper or va ve (Z having a stem d extending mto the tube and having a spring or. springs e secured thereto. As shown the spring or sprin are passed throu h .a bore or bores ma e in the. stem, and t ey are fixed in position by pressing when discharged. I With these objects in view my.invention-con-- the stem together after inserting the same.

The free-en s e of the spring-or springs bear on an annular shoulder 8 formed. internally of the head, and they tend to pull the stopper d inwards and on its seat 9. 'Upon compressing the tube the matter enclosed therein forces the stopper d from its seat against the action of the spring orsprings e, and it comes out in the form of a-cylindrical tube having a thin wall. Upon relieving the pressure the stopper is seated by the spring and severe the cylindrical tube on the outside of the container from the body of the matter remaining in the container.

'In such' cases in which thematter is comparatively tough I preferto make the seat 9 in the form of a sharp annular edge adapted to ,cut through the film. To prevent the said edge from cutting into the conical portion of the stopper-I providethe, head 0 with radial internal ribs h bearin' in the closed position of the stopper on t e conical surace thereof.

While in describing the invention referencehas been made to a particular example embodying the same I. wish it to be understood that I do not limit myself to the constru'ction shown in the. drawing. For example, I do not limit myself to the conical form of the'stopper or to the form of the s ring or springs shown in the figures.

referably t e stopper and the spring or springs are coated w th suitable matter such as lead, tin, or lacquer. a

I claim:

1. A tube comprising a body formed with a head, said head provided with a tapered discharge opening and with internal radial ribs ad acent said opening, said 0 ening and "ribs forming a seat, an outward y opening stopper shaped to seat within said tapere discharge opening, and a spring located within the tube and engaging the sto per whereby the latter is normally held in c osed position. I

2. A tube comprisin a body formed with a head, said head provided w1th an annular tapered discharge opening and with internalradial ribs adjacent said opening, said open ing andribs forming a seat, an outwardly opening stopper shaped to seat within said tapered discharge'opening, and a spring 10- closed position! cateci fiithili I per whereb' the .latterisjpol' xoal y-held m: shoulder where y the stopperisnormally -held in closed position.

'3. A tube compri in B ahead,'said headipl o vided with discharge' 'signati1re in the presence of two' witnesses.

ogoning, an outwardlyil-E opening stopper. WALTHER KALB.

s apedto seat within said'-'opening,'a.,shoul-'z. Witnesses: y 1 x der formed on't he interiolfl-surfaco oithe I EMORY H; L0 1 tube and, a bar spripg whplly within the 1 Ramona P. W sywx.

jt li ieiigafiing the Stopper 5nd said 10 gfii- In,-'testimony whereof I hereuntoaflix iny: 

